The Urban Dictionary T-Shirt

When a driver follows the car in front leaving little or no stopping distance especially at high speed.

This behaviour may stem from any or all of the following:

Lack of imagination.
Never seen pictures of a road accident.
Learning difficulties.
Road rage.
Someone who only managed to pass his/her driving test by giving the examiner a blow job.
Suicidal tendencies.
Having an extra chromosome.
Loneliness or pathological nosiness
Drink or drugs.
Being born with somekind of twat gene.
Driver is busy trying to figure out what the indicator lever is for.
A guy that is so dammed horny that he just can't wait to get to his mothers house.

Many female tailgaters like to put a sign in the rear window of their car stating that there is a 'Baby on Board'.